Double digit fuel savings possible using existing technology, finds study

Double digit fuel savings possible using existing technology, finds study
The oil and chemical product tanker Hafnia Lise, one of the case study vessels under the Green Ship of the Future project.

Green Ship of the Future (GSF) and its 20 partner organisations have identified that fuel savings of up to 27 per cent could be achieved by using existing technologies that have an ROI of less than 3 years.

In the retrofit series project, which began in 2019, Green Ship of the Future and its 20 partners examined the potential for optimising the energy consumption of existing vessels, and the impact on their fuel use and CO2 emissions. The results indicated that a 27 per cent cut in energy consumption was possible, using only technologies that are available today and can be retrofitted with an ROI of less than 3 years. The report also points to some general areas, which based on the case studies of three different vessels, show potential for large energy savings.

The project analyses three different high-volume vessels – two MR tankers from Hafnia and Maersk Tankers, and a RO-PAX ferry from DFDS.  By applying actual data from the vessels and their operational profile, the partners have analysed the three cases for potential savings.

The purpose of the report is to investigate what can be done with the large part of the global fleet that is not up for renewal anytime soon and therefore will continue  to  emit  the  same  large  amount  of  greenhouse  gases (GHG)  as  today,  unless  they are equipped with  new technology.

The project is part of GSF’s mission to find a sustainable way to reduce emissions from the maritime industry. While the end goal is a new fuel that does not affect the climate and environment to the extent it does today, and such a transition is underway, it will be decades before technology is scaled and the entire global fleet will be able to transition. Energy optimisation from an environmental and climate perspective will be essential  in  the  coming  years.  While the  GHG  emissions  will  become  neutral  with  the  implementation  of alternative fuels, the financial gain from energy optimisation will only increase, as all alternative energy sources are projected to be significantly more expensive than fossil counterparts. Therefore, investing in improving energy efficiency  will  not  only  make  a  good  sense  from  a  climate  perspective,  but will also contribute  to  future competitive advantages.

“In DFDS we believe that the report and project results speak for themselves. Projects like this are welcome eyeopeners for potential retrofits that can lower our environmental impact and present a good business case,” said Rune Jørgensen Daae, project superintendent, DFDS .

“It is positive to see that despite a lot has been done, there are still large savings to be made. We believe we must continue to optimise our vessels to become even more sustainable, reduce operational costs and stay competitive, but also to ease the change to alternative energy sources. We hope that this project will bring concrete saving potentials and inspire others to optimise their vessels.”

Partners in the project include: Hafina, DFDS, Maersk Tankers, Alfa Laval, MAN Energy Solutions, Wärtsilä, C.C. Jensen, Dansk  Energirådgivning,  BOS  Global,  Norsepower,  Kongsberg,  MS  Engineering,  Bureau  Veritas,  DNV  GL, Greensteam, Optimum Voyage, DESMI, Royston, DEIF, Clorius Controls and HEMPEL.